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Inch (Tradescantia zebrina) and spider (Chlorophytum comosum) plants were grown in a growth chamber for two months in plastic containers to evaluate the effects of different light treatments (TO Tube luminescent Dunn (TLD) lamps or control), TB (TLD lamps + blue light emitting diodes (LEDs)), TR (TLD lamps + red LEDs), and TBR (TLD lamps + blue and red LEDs) on biomass, photosynthesis, and physiological parameters. Total dry weight and water content were evaluated at the end of the experimental period. After two months, pigment concentrations and the photosynthetic rate were assessed in both species. The total soluble sugar, starch, and proline concentrations in the leaf as physiological parameters were studied at the end of the experiment. Both species had increased root, shoot, and total dry weight under blue LEDs conditions. The chlorophyll concentration showed a specific response in each species under monochromic or mixed red-blue LEDs. The highest photosynthetic rate was measured under the addition of mixed red-blue LEDs with TLD lamps. At the physiological level, each species triggered different responses with respect to total soluble sugars and the proline concentration in leaves under monochromic or mixed red-blue LEDs. Our study demonstrated that the addition of blue LEDs is advisable for the production of these ornamental foliage species.
Pedro García-Caparrós; Gabriela Martínez-Ramírez; Eva María Almansa; Francisco Javier Barbero; Rosa María Chica; María Teresa Lao. Growth, Photosynthesis, and Physiological Responses of Ornamental Plants to Complementation with Monochromic or Mixed Red-Blue LEDs for Use in Indoor Environments. Agronomy 2020, 10, 284 .
AMA StylePedro García-Caparrós, Gabriela Martínez-Ramírez, Eva María Almansa, Francisco Javier Barbero, Rosa María Chica, María Teresa Lao. Growth, Photosynthesis, and Physiological Responses of Ornamental Plants to Complementation with Monochromic or Mixed Red-Blue LEDs for Use in Indoor Environments. Agronomy. 2020; 10 (2):284.
Chicago/Turabian StylePedro García-Caparrós; Gabriela Martínez-Ramírez; Eva María Almansa; Francisco Javier Barbero; Rosa María Chica; María Teresa Lao. 2020. "Growth, Photosynthesis, and Physiological Responses of Ornamental Plants to Complementation with Monochromic or Mixed Red-Blue LEDs for Use in Indoor Environments." Agronomy 10, no. 2: 284.
The purpose of the present study was to evaluate the effects of different light treatments on biomass, nutrient concentrations and physiological parameters of Fittonia verschaffeltii (Lem) Van Houtte. The aim was to establish a methodology to evaluate the effect of photosynthetically active radiation (PAR) emitted by lamps on biomass. The light treatments used were tube luminescent Dunn (TL-D), tube luminescent Dunn + light emitting diodes (LEDs) and Tube luminescent 5 (TL-5). At the end of the experimental period, biomass, nutritional, biochemical, and physiological parameters were assessed. A clear reduction in total plant dry weight under TL-D + LEDs at the end of the experiment was recorded. With respect to nutrient concentration in the different organs assessed, there was no clear response under the different light treatments. The growth under TL-D lamps resulted in the highest concentration of total soluble sugars and starch in leaves, whereas the highest value of indole 3-acetic acid concentration was under TL-5 lamps. Plants grown under TL-D + LEDs showed the lowest values of chlorophyll a, b and a + b. The relationship proposed between integrated use of spectral energy (IUSE) and total dry weight (TDW) showed a good correlation with an R2 value of 0.86, therefore we recommend this methodology to discern the effects of the different spectral qualities on plant biomass.
Pedro García-Caparros; Eva María Almansa; Francisco Javier Barbero; Rosa María Chica; María Teresa Lao. Fittonia verschaffeltii Response to Artificial Light Treatments: BIOMASS, Nutrient Concentrations and Physiological Changes. Agronomy 2020, 10, 126 .
AMA StylePedro García-Caparros, Eva María Almansa, Francisco Javier Barbero, Rosa María Chica, María Teresa Lao. Fittonia verschaffeltii Response to Artificial Light Treatments: BIOMASS, Nutrient Concentrations and Physiological Changes. Agronomy. 2020; 10 (1):126.
Chicago/Turabian StylePedro García-Caparros; Eva María Almansa; Francisco Javier Barbero; Rosa María Chica; María Teresa Lao. 2020. "Fittonia verschaffeltii Response to Artificial Light Treatments: BIOMASS, Nutrient Concentrations and Physiological Changes." Agronomy 10, no. 1: 126.
Specific wavebands may allow precise control of plant growth. However, light sources must be carefully evaluated before the large-scale use of supplemental light sources can be implemented. Dieffenbachia maculata “Compacta” plants were grown for 8 weeks in pots in a growth chamber under tightly controlled temperature and humidity in order to assess the effects of supplemental light. Three treatments were applied: (i) using 18-W fluorescent bulbs (T1), (ii) using the same bulbs with supplemental light emitting diodes (LEDs) (Pure Blue and Pure Red Mix-Light-Emitting Diodes (BR-LEDs)) (T2), and (iii) using high-efficiency TL5 fluorescents (T3). Plant biomass, mineral composition, and physiological and photosynthetic parameters were assessed under each light treatment. Total plant dry weight was highest in plants grown under treatments T1 and T3. Other differences were observed between different light treatments, including variation in biomass partitioning as well as N and K concentrations in roots, stems, and leaves. Further, proline and indole 3-acetic acid (IAA) levels were higher in plants grown under the T1 treatment, whereas total soluble sugars and starch were higher in plants grown under treatment T3. Plants grown under treatment T1 had the lowest chlorophyll concentrations. No differences were observed in organ water content and P concentration. T2 was not the best treatment, as expected. The model proposed a linear regression between integrated use of spectral energy (IUSE) and total dry weight (TDW), which showed a good relationship with an R2 value of 0.83. Therefore, we recommend this methodology to discern the effects of the different spectral qualities on plant biomass.
Pedro García-Caparrós; Eva Almansa; Rosa Chica; María Lao. Effects of Artificial Light Treatments on Growth, Mineral Composition, Physiology, and Pigment Concentration in Dieffenbachia maculata “Compacta” Plants. Sustainability 2019, 11, 2867 .
AMA StylePedro García-Caparrós, Eva Almansa, Rosa Chica, María Lao. Effects of Artificial Light Treatments on Growth, Mineral Composition, Physiology, and Pigment Concentration in Dieffenbachia maculata “Compacta” Plants. Sustainability. 2019; 11 (10):2867.
Chicago/Turabian StylePedro García-Caparrós; Eva Almansa; Rosa Chica; María Lao. 2019. "Effects of Artificial Light Treatments on Growth, Mineral Composition, Physiology, and Pigment Concentration in Dieffenbachia maculata “Compacta” Plants." Sustainability 11, no. 10: 2867.
Nowadays, the evaluation of sustainability is an important aspect in the study of agricultural systems and the number of projects and methods for impact assessment of food production systems is increasing. In this work, we initially carried out a survey to know the status of the artificial lighting establishment in horticultural seedling nurseries in southern Spain. Taking into account the data obtained in the survey, we conducted an experiment with different types of fluorescent lamps (TLD-18, CF, TL5, TLD-56), light-emitting diodes (LEDs) and their combinations along with the novelty white LEDs lamps and XTRASUN LEDs to evaluate their technical parameters and spectral light qualities. In addition, the effectiveness of light irradiance (ELIplant) and the use of irradiance (UI) by cucumber and tomato seedling plants were estimated considering their light absorbance capacity previously analyzed. The results showed that TLD-18 lamps and their combinations, CF and XTRASUN LEDs, had a limited value of energy efficiency (VEEI) ≤ 2. The lamps essayed with the lowest total irradiance were LEDs (B, R, V, W) and the ones with the highest values were TLD58-6 lamps. The effectiveness of light irradiance (ELIplant) and the UI were slightly higher in the case of cucumber than that of the tomato for all essayed lamps. Considering the effectiveness of the light irradiance (ELIplant), TL5-6 lamps showed the highest values. On the other hand, considering the use of irradiance, XTRASUN LEDs on the mode of vegetative growth (VG) showed the highest values.
Pedro Garcia-Caparros; Rosa María Chica; Eva María Almansa; Antonio Rull; Lara Alicia Rivas; Antonio García-Buendía; Francisco Javier Barbero; María Teresa Lao. Comparisons of Different Lighting Systems for Horticultural Seedling Production Aimed at Energy Saving. Sustainability 2018, 10, 3351 .
AMA StylePedro Garcia-Caparros, Rosa María Chica, Eva María Almansa, Antonio Rull, Lara Alicia Rivas, Antonio García-Buendía, Francisco Javier Barbero, María Teresa Lao. Comparisons of Different Lighting Systems for Horticultural Seedling Production Aimed at Energy Saving. Sustainability. 2018; 10 (9):3351.
Chicago/Turabian StylePedro Garcia-Caparros; Rosa María Chica; Eva María Almansa; Antonio Rull; Lara Alicia Rivas; Antonio García-Buendía; Francisco Javier Barbero; María Teresa Lao. 2018. "Comparisons of Different Lighting Systems for Horticultural Seedling Production Aimed at Energy Saving." Sustainability 10, no. 9: 3351.
Eva María Almansa; Rosa María Chica; María Teresa Lao. Influence of the quality of artificial light on grafting tomato. Australian Journal of Crop Science 2018, 12, 318 -325.
AMA StyleEva María Almansa, Rosa María Chica, María Teresa Lao. Influence of the quality of artificial light on grafting tomato. Australian Journal of Crop Science. 2018; 12 (2):318-325.
Chicago/Turabian StyleEva María Almansa; Rosa María Chica; María Teresa Lao. 2018. "Influence of the quality of artificial light on grafting tomato." Australian Journal of Crop Science 12, no. 2: 318-325.